#define _XOPEN_SOURCE 500
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <wchar.h>
int
main(void)
{
FILE *fp;
const char *str = "abcdef";
wint_t ret, wc, ungetone = 0x00E4;
char fname[] = "/tmp/tst-ungetwc1.out.XXXXXX";
int fd;
int result = 0;
puts("This program runs on de_DE.UTF-8 locale.");
if (setlocale(LC_ALL, "de_DE.UTF-8") == NULL) {
fprintf(stderr, "Err: Cannot run on the de_DE.UTF-8 locale");
exit(EXIT_FAILURE);
}
fd = mkstemp(fname);
if (fd == -1) {
printf("cannot open temp file: %m\n");
exit(EXIT_FAILURE);
}
if ((fp = fdopen(fd, "w")) == NULL) {
fprintf(stderr, "Cannot open 'testfile'.");
exit(EXIT_FAILURE);
}
fputs(str, fp);
fclose(fp);
if ((fp = fopen(fname, "r")) == NULL) {
fprintf(stderr, "Cannot open 'testfile'.");
exit(EXIT_FAILURE);
}
ret = ungetwc(ungetone, fp);
printf("Unget a character (0x%04x)\n", (unsigned int) ungetone);
fflush(stdout);
if (ret == WEOF) {
puts("ungetwc() returns NULL.");
exit(EXIT_SUCCESS);
}
wc = getwc(fp);
printf("Reget a character (0x%04x)\n", (unsigned int) wc);
fflush(stdout);
if (wc == ungetone) {
puts("The ungotten character is equal to the regotten character.");
fflush(stdout);
} else {
puts("The ungotten character is not equal to the regotten character.");
printf("ungotten one: %04x, regetone: %04x", ungetone, wc);
fflush(stdout);
result = 1;
}
fclose(fp);
unlink(fname);
return result;
}
